python3.4 uses functions to operate mysql5.7 database-Python Tutorial-php.cn

<span style="font-size: 18pt"><span style="color: #008080"> 1</span> <span style="color: #008000">#</span><span style="color: #008000">!/usr/bin/env python</span>
<span style="color: #008080"> 2</span> <span style="color: #008000">#</span><span style="color: #008000"> -*- coding:utf-8 -*-</span>
<span style="color: #008080"> 3</span> <span style="color: #008000">#</span><span style="color: #008000"> __author__ = "blzhu"</span>
<span style="color: #008080"> 4</span> <span style="color: #800000">"""</span>
<span style="color: #008080"> 5</span> <span style="color: #800000">python study
</span><span style="color: #008080"> 6</span> <span style="color: #800000">Date：2017
</span><span style="color: #008080"> 7</span> <span style="color: #800000">"""</span>
<span style="color: #008080"> 8</span> <span style="color: #008000">#</span><span style="color: #008000"> -*- coding: utf-8 -*-</span>
<span style="color: #008080"> 9</span> <span style="color: #800080">__author__</span> = <span style="color: #800000">'</span><span style="color: #800000">djstava@gmail.com</span><span style="color: #800000">'</span>
<span style="color: #008080">10</span> 
<span style="color: #008080">11</span> <span style="color: #0000ff">import</span><span style="color: #000000"> logging
</span><span style="color: #008080">12</span> <span style="color: #0000ff">import</span><span style="color: #000000"> pymysql
</span><span style="color: #008080">13</span> 
<span style="color: #008080">14</span> 
<span style="color: #008080">15</span> <span style="color: #0000ff">class</span><span style="color: #000000"> MySQLCommand(object):
</span><span style="color: #008080">16</span>     <span style="color: #0000ff">def</span> <span style="color: #800080">__init__</span><span style="color: #000000">(self, host, port, user, passwd, db, table, charset):
</span><span style="color: #008080">17</span>         self.host =<span style="color: #000000"> host
</span><span style="color: #008080">18</span>         self.port =<span style="color: #000000"> port
</span><span style="color: #008080">19</span>         self.user =<span style="color: #000000"> user
</span><span style="color: #008080">20</span>         self.password =<span style="color: #000000"> passwd
</span><span style="color: #008080">21</span>         self.db =<span style="color: #000000"> db
</span><span style="color: #008080">22</span>         self.table =<span style="color: #000000"> table
</span><span style="color: #008080">23</span>         self.charset =<span style="color: #000000"> charset
</span><span style="color: #008080">24</span> 
<span style="color: #008080">25</span>     <span style="color: #0000ff">def</span><span style="color: #000000"> connectMysql(self):
</span><span style="color: #008080">26</span>         <span style="color: #0000ff">try</span><span style="color: #000000">:
</span><span style="color: #008080">27</span>             self.conn = pymysql.connect(host=self.host, port=self.port, user=self.user, passwd=<span style="color: #000000">self.password,
</span><span style="color: #008080">28</span>                                         db=self.db, charset=<span style="color: #000000">self.charset)
</span><span style="color: #008080">29</span>             self.cursor =<span style="color: #000000"> self.conn.cursor()
</span><span style="color: #008080">30</span>             <span style="color: #0000ff">print</span>(<span style="color: #800000">'</span><span style="color: #800000">connect </span><span style="color: #800000">'</span> + self.table + <span style="color: #800000">'</span><span style="color: #800000"> correctly!</span><span style="color: #800000">'</span><span style="color: #000000">)
</span><span style="color: #008080">31</span>         <span style="color: #0000ff">except</span><span style="color: #000000">:
</span><span style="color: #008080">32</span>             <span style="color: #0000ff">print</span>(<span style="color: #800000">'</span><span style="color: #800000">connect mysql error.</span><span style="color: #800000">'</span><span style="color: #000000">)
</span><span style="color: #008080">33</span> 
<span style="color: #008080">34</span>     <span style="color: #0000ff">def</span><span style="color: #000000"> queryMysql(self):
</span><span style="color: #008080">35</span>         sql = <span style="color: #800000">"</span><span style="color: #800000">SELECT * FROM </span><span style="color: #800000">"</span> +<span style="color: #000000"> self.table
</span><span style="color: #008080">36</span> 
<span style="color: #008080">37</span>         <span style="color: #0000ff">try</span><span style="color: #000000">:
</span><span style="color: #008080">38</span>             <span style="color: #0000ff">print</span>(<span style="color: #800000">"</span><span style="color: #800000">query Mysql:</span><span style="color: #800000">"</span><span style="color: #000000">)
</span><span style="color: #008080">39</span> <span style="color: #000000">            self.cursor.execute(sql)
</span><span style="color: #008080">40</span>             <span style="color: #008000">#</span><span style="color: #008000">row = self.cursor.fetchone()</span>
<span style="color: #008080">41</span>             <span style="color: #0000ff">for</span> d <span style="color: #0000ff">in</span><span style="color: #000000"> self.cursor:
</span><span style="color: #008080">42</span>                 <span style="color: #0000ff">print</span>(str(d[0]), str(d[1]), str(d[2<span style="color: #000000">]))
</span><span style="color: #008080">43</span>                 <span style="color: #008000">#</span><span style="color: #008000"> print(row)</span>
<span style="color: #008080">44</span> 
<span style="color: #008080">45</span>         <span style="color: #0000ff">except</span><span style="color: #000000">:
</span><span style="color: #008080">46</span>             <span style="color: #0000ff">print</span>(sql + <span style="color: #800000">'</span><span style="color: #800000"> execute failed.</span><span style="color: #800000">'</span><span style="color: #000000">)
</span><span style="color: #008080">47</span> 
<span style="color: #008080">48</span>     <span style="color: #0000ff">def</span><span style="color: #000000"> insertMysql(self, id, name, sex):
</span><span style="color: #008080">49</span>         sql = <span style="color: #800000">"</span><span style="color: #800000">INSERT INTO </span><span style="color: #800000">"</span> + self.table + <span style="color: #800000">"</span><span style="color: #800000"> VALUES(</span><span style="color: #800000">"</span> + id + <span style="color: #800000">"</span><span style="color: #800000">,</span><span style="color: #800000">"</span> + <span style="color: #800000">"</span><span style="color: #800000">'</span><span style="color: #800000">"</span> + name + <span style="color: #800000">"</span><span style="color: #800000">',</span><span style="color: #800000">"</span> + <span style="color: #800000">"</span><span style="color: #800000">'</span><span style="color: #800000">"</span> + sex + <span style="color: #800000">"</span><span style="color: #800000">')</span><span style="color: #800000">"</span>
<span style="color: #008080">50</span>         <span style="color: #0000ff">try</span><span style="color: #000000">:
</span><span style="color: #008080">51</span>             <span style="color: #0000ff">print</span>(<span style="color: #800000">"</span><span style="color: #800000">insert Mysql:</span><span style="color: #800000">"</span><span style="color: #000000">)
</span><span style="color: #008080">52</span> <span style="color: #000000">            self.cursor.execute(sql)
</span><span style="color: #008080">53</span>             <span style="color: #0000ff">print</span><span style="color: #000000">(sql)
</span><span style="color: #008080">54</span>         <span style="color: #0000ff">except</span><span style="color: #000000">:
</span><span style="color: #008080">55</span>             <span style="color: #0000ff">print</span>(<span style="color: #800000">"</span><span style="color: #800000">insert failed.</span><span style="color: #800000">"</span><span style="color: #000000">)
</span><span style="color: #008080">56</span> 
<span style="color: #008080">57</span>     <span style="color: #0000ff">def</span><span style="color: #000000"> updateMysqlSN(self, name, sex):
</span><span style="color: #008080">58</span>         sql = <span style="color: #800000">"</span><span style="color: #800000">UPDATE </span><span style="color: #800000">"</span> + self.table + <span style="color: #800000">"</span><span style="color: #800000"> SET sex='</span><span style="color: #800000">"</span> + sex + <span style="color: #800000">"</span><span style="color: #800000">'</span><span style="color: #800000">"</span> + <span style="color: #800000">"</span><span style="color: #800000"> WHERE name='</span><span style="color: #800000">"</span> + name + <span style="color: #800000">"</span><span style="color: #800000">'</span><span style="color: #800000">"</span>
<span style="color: #008080">59</span>         <span style="color: #0000ff">print</span>(<span style="color: #800000">"</span><span style="color: #800000">update sn:</span><span style="color: #800000">"</span> +<span style="color: #000000"> sql)
</span><span style="color: #008080">60</span> 
<span style="color: #008080">61</span>         <span style="color: #0000ff">try</span><span style="color: #000000">:
</span><span style="color: #008080">62</span> <span style="color: #000000">            self.cursor.execute(sql)
</span><span style="color: #008080">63</span> <span style="color: #000000">            self.conn.commit()
</span><span style="color: #008080">64</span>         <span style="color: #0000ff">except</span><span style="color: #000000">:
</span><span style="color: #008080">65</span> <span style="color: #000000">            self.conn.rollback()
</span><span style="color: #008080">66</span> 
<span style="color: #008080">67</span>     <span style="color: #0000ff">def</span> deleteMysql(self, id):  <span style="color: #008000">#</span><span style="color: #008000"> 删除</span>
<span style="color: #008080">68</span>         sql = <span style="color: #800000">"</span><span style="color: #800000">DELETE FROM %s  WHERE id='%s'</span><span style="color: #800000">"</span> %<span style="color: #000000"> (self.table,id)
</span><span style="color: #008080">69</span>         <span style="color: #008000">#</span><span style="color: #008000">"delete from student where zid='%s'" % (id)</span>
<span style="color: #008080">70</span>         <span style="color: #0000ff">try</span><span style="color: #000000">:
</span><span style="color: #008080">71</span> <span style="color: #000000">            self.cursor.execute(sql)
</span><span style="color: #008080">72</span>             <span style="color: #0000ff">print</span><span style="color: #000000">(sql)
</span><span style="color: #008080">73</span> <span style="color: #000000">            self.conn.commit()
</span><span style="color: #008080">74</span>             <span style="color: #0000ff">print</span>(<span style="color: #800000">"</span><span style="color: #800000">delete the </span><span style="color: #800000">"</span> + id + <span style="color: #800000">"</span><span style="color: #800000">th row successfully!</span><span style="color: #800000">"</span><span style="color: #000000">)
</span><span style="color: #008080">75</span>         <span style="color: #0000ff">except</span><span style="color: #000000">:
</span><span style="color: #008080">76</span>             <span style="color: #0000ff">print</span>(<span style="color: #800000">"</span><span style="color: #800000">delete failed!</span><span style="color: #800000">"</span><span style="color: #000000">)
</span><span style="color: #008080">77</span> <span style="color: #000000">            self.conn.rollback()
</span><span style="color: #008080">78</span> 
<span style="color: #008080">79</span>     <span style="color: #0000ff">def</span><span style="color: #000000"> closeMysql(self):
</span><span style="color: #008080">80</span>         self.conn.commit()  <span style="color: #008000">#</span><span style="color: #008000"> 不执行此句，所作的操作不会写入到数据库中</span>
<span style="color: #008080">81</span> <span style="color: #000000">        self.cursor.close()
</span><span style="color: #008080">82</span> <span style="color: #000000">        self.conn.close()
</span><span style="color: #008080">83</span> 
<span style="color: #008080">84</span> 
<span style="color: #008080">85</span> <span style="color: #0000ff">if</span> <span style="color: #800080">__name__</span> == <span style="color: #800000">'</span><span style="color: #800000">__main__</span><span style="color: #800000">'</span><span style="color: #000000">:
</span><span style="color: #008080">86</span>     zblmysql = MySQLCommand(host=<span style="color: #800000">'</span><span style="color: #800000">localhost</span><span style="color: #800000">'</span>, user=<span style="color: #800000">'</span><span style="color: #800000">root</span><span style="color: #800000">'</span>, passwd=<span style="color: #800000">'</span><span style="color: #800000">root</span><span style="color: #800000">'</span>, db=<span style="color: #800000">'</span><span style="color: #800000">zbltest1</span><span style="color: #800000">'</span>, port=3306, table=<span style="color: #800000">'</span><span style="color: #800000">student2</span><span style="color: #800000">'</span><span style="color: #000000">,
</span><span style="color: #008080">87</span>                             charset=<span style="color: #800000">'</span><span style="color: #800000">utf8</span><span style="color: #800000">'</span><span style="color: #000000">)
</span><span style="color: #008080">88</span> <span style="color: #000000">    zblmysql.connectMysql()
</span><span style="color: #008080">89</span> <span style="color: #000000">    zblmysql.queryMysql()
</span><span style="color: #008080">90</span>     zblmysql.insertMysql(<span style="color: #800000">'</span><span style="color: #800000">5</span><span style="color: #800000">'</span>, <span style="color: #800000">'</span><span style="color: #800000">zbl5</span><span style="color: #800000">'</span>, <span style="color: #800000">'</span><span style="color: #800000">man</span><span style="color: #800000">'</span><span style="color: #000000">)
</span><span style="color: #008080">91</span> <span style="color: #000000">    zblmysql.queryMysql()
</span><span style="color: #008080">92</span>     zblmysql.deleteMysql(id=2<span style="color: #000000">)
</span><span style="color: #008080">93</span> <span style="color: #000000">    zblmysql.queryMysql()
</span><span style="color: #008080">94</span>     zblmysql.updateMysqlSN(name=<span style="color: #800000">'</span><span style="color: #800000">zbl5</span><span style="color: #800000">'</span>,sex=<span style="color: #800000">'</span><span style="color: #800000">woman</span><span style="color: #800000">'</span><span style="color: #000000">)
</span><span style="color: #008080">95</span> <span style="color: #000000">    zblmysql.queryMysql()
</span><span style="color: #008080">96</span>     zblmysql.closeMysql()</span>
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